JSFiddle - React, Tailwind, and code Playground

JavaScript

var input1="whdb_css";
    var input2="whdb<css";
    var input3="<whdbcss";
    var regex = new RegExp("[^<>/\\\\=|:*?\"]+$");
    if(regex.test(input1)) {
        alert("valid input 1");
    }
    else{
    	alert("not valid input 1");
    }
    
    if(regex.test(input2))  {
        alert("valid input 2");
    }
    else {
    	alert("not valid input 2")
    }
    
    if(regex.test(input3))  {
        alert("valid input 3");
    }
    else {
    	alert("not valid input 3")
    }